Struct WaterParams 

#[repr(C)]
pub struct WaterParams {

    pub centre: [f32; 4],
    pub deep_colour: [f32; 4],
    pub shallow_colour: [f32; 4],
    pub depth_falloff: f32,
    pub foam_width: f32,
    pub foam_intensity: f32,
    pub fresnel_power: f32,
    pub roughness: f32,
    pub refraction_strength: f32,
    pub wave_count: u32,
    pub _pad: f32,
    pub waves: [WaterWaveGpu; 4],
    pub planar: [f32; 4],
}

Per-surface tunables for a WaterSurface, uploaded once per surface. The vec3-ish fields are [f32; 4] so the layout is byte-identical to the shader’s float4. Matches WaterParams in shaders/water.slang. 224 bytes.

Fields

centre: [f32; 4]

[x, y, z, _]: world-space surface centre.

deep_colour: [f32; 4]

[r, g, b, _]: water tint at full column depth.

shallow_colour: [f32; 4]

[r, g, b, _]: water tint just above the seabed.

depth_falloff: f32

Depth over which the tint blends from shallow to deep, in metres.

foam_width: f32

Width of the shoreline foam band, in world units.

foam_intensity: f32

Foam brightness multiplier.

fresnel_power: f32

Exponent of the Fresnel reflectance curve.

roughness: f32

Perceptual roughness in [0, 1]; picks the reflection’s prefilter mip.

refraction_strength: f32

How far refraction offsets the sampled background.

wave_count: u32

Live entries in waves.

_pad: f32

Padding so the field layout matches the shader-side struct.

waves: [WaterWaveGpu; 4]

Wave coefficients; the first wave_count entries are live.

planar: [f32; 4]

Planar reflection control: [strength, distortion, _, _]. strength > 0.5 selects the sharp planar reflection (the scene re-rendered mirrored across this surface’s rest plane, sampled at screen UV) over the probe / sky cube; distortion scales the wave-normal ripple offset of that lookup. 0 when planar is off (RT on, no planar slot, or the plane overflowed the budget), keeping the probe / sky path.

Trait Implementations

impl Clone for WaterParams

fn clone(&self) -> WaterParams

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for WaterParams

impl NoUninit for WaterParams